src/converter.js
"use strict";
/**
* Runtime message from/to plain object converters.
* @namespace
*/
var converter = exports;
var Enum = require("./enum"),
util = require("./util");
/**
* Generates a partial value fromObject conveter.
* @param {Codegen} gen Codegen instance
* @param {Field} field Reflected field
* @param {number} fieldIndex Field index
* @param {string} prop Property reference
* @returns {Codegen} Codegen instance
* @ignore
*/
function genValuePartial_fromObject(gen, field, fieldIndex, prop) {
var defaultAlreadyEmitted = false;
/* eslint-disable no-unexpected-multiline, block-scoped-var, no-redeclare */
if (field.resolvedType) {
if (field.resolvedType instanceof Enum) { gen
("switch(d%s){", prop);
for (var values = field.resolvedType.values, keys = Object.keys(values), i = 0; i < keys.length; ++i) {
// enum unknown values passthrough
if (values[keys[i]] === field.typeDefault && !defaultAlreadyEmitted) { gen
("default:")
("if(typeof(d%s)===\"number\"){m%s=d%s;break}", prop, prop, prop);
if (!field.repeated) gen // fallback to default value only for
// arrays, to avoid leaving holes.
("break"); // for non-repeated fields, just ignore
defaultAlreadyEmitted = true;
}
gen
("case%j:", keys[i])
("case %i:", values[keys[i]])
("m%s=%j", prop, values[keys[i]])
("break");
} gen
("}");
} else gen
("if(typeof d%s!==\"object\")", prop)
("throw TypeError(%j)", field.fullName + ": object expected")
("m%s=types[%i].fromObject(d%s)", prop, fieldIndex, prop);
} else {
var isUnsigned = false;
switch (field.type) {
case "double":
case "float": gen
("m%s=Number(d%s)", prop, prop); // also catches "NaN", "Infinity"
break;
case "uint32":
case "fixed32": gen
("m%s=d%s>>>0", prop, prop);
break;
case "int32":
case "sint32":
case "sfixed32": gen
("m%s=d%s|0", prop, prop);
break;
case "uint64":
isUnsigned = true;
// eslint-disable-next-line no-fallthrough
case "int64":
case "sint64":
case "fixed64":
case "sfixed64": gen
("if(util.Long)")
("(m%s=util.Long.fromValue(d%s)).unsigned=%j", prop, prop, isUnsigned)
("else if(typeof d%s===\"string\")", prop)
("m%s=parseInt(d%s,10)", prop, prop)
("else if(typeof d%s===\"number\")", prop)
("m%s=d%s", prop, prop)
("else if(typeof d%s===\"object\")", prop)
("m%s=new util.LongBits(d%s.low>>>0,d%s.high>>>0).toNumber(%s)", prop, prop, prop, isUnsigned ? "true" : "");
break;
case "bytes": gen
("if(typeof d%s===\"string\")", prop)
("util.base64.decode(d%s,m%s=util.newBuffer(util.base64.length(d%s)),0)", prop, prop, prop)
("else if(d%s.length >= 0)", prop)
("m%s=d%s", prop, prop);
break;
case "string": gen
("m%s=String(d%s)", prop, prop);
break;
case "bool": gen
("m%s=Boolean(d%s)", prop, prop);
break;
/* default: gen
("m%s=d%s", prop, prop);
break; */
}
}
return gen;
/* eslint-enable no-unexpected-multiline, block-scoped-var, no-redeclare */
}
/**
* Generates a plain object to runtime message converter specific to the specified message type.
* @param {Type} mtype Message type
* @returns {Codegen} Codegen instance
*/
converter.fromObject = function fromObject(mtype) {
/* eslint-disable no-unexpected-multiline, block-scoped-var, no-redeclare */
var fields = mtype.fieldsArray;
var gen = util.codegen(["d"], mtype.name + "$fromObject")
("if(d instanceof this.ctor)")
("return d");
if (!fields.length) return gen
("return new this.ctor");
gen
("var m=new this.ctor");
for (var i = 0; i < fields.length; ++i) {
var field = fields[i].resolve(),
prop = util.safeProp(field.name);
// Map fields
if (field.map) { gen
("if(d%s){", prop)
("if(typeof d%s!==\"object\")", prop)
("throw TypeError(%j)", field.fullName + ": object expected")
("m%s={}", prop)
("for(var ks=Object.keys(d%s),i=0;i<ks.length;++i){", prop);
genValuePartial_fromObject(gen, field, /* not sorted */ i, prop + "[ks[i]]")
("}")
("}");
// Repeated fields
} else if (field.repeated) { gen
("if(d%s){", prop)
("if(!Array.isArray(d%s))", prop)
("throw TypeError(%j)", field.fullName + ": array expected")
("m%s=[]", prop)
("for(var i=0;i<d%s.length;++i){", prop);
genValuePartial_fromObject(gen, field, /* not sorted */ i, prop + "[i]")
("}")
("}");
// Non-repeated fields
} else {
if (!(field.resolvedType instanceof Enum)) gen // no need to test for null/undefined if an enum (uses switch)
("if(d%s!=null){", prop); // !== undefined && !== null
genValuePartial_fromObject(gen, field, /* not sorted */ i, prop);
if (!(field.resolvedType instanceof Enum)) gen
("}");
}
} return gen
("return m");
/* eslint-enable no-unexpected-multiline, block-scoped-var, no-redeclare */
};
/**
* Generates a partial value toObject converter.
* @param {Codegen} gen Codegen instance
* @param {Field} field Reflected field
* @param {number} fieldIndex Field index
* @param {string} prop Property reference
* @returns {Codegen} Codegen instance
* @ignore
*/
function genValuePartial_toObject(gen, field, fieldIndex, prop) {
/* eslint-disable no-unexpected-multiline, block-scoped-var, no-redeclare */
if (field.resolvedType) {
if (field.resolvedType instanceof Enum) gen
("d%s=o.enums===String?(types[%i].values[m%s]===undefined?m%s:types[%i].values[m%s]):m%s", prop, fieldIndex, prop, prop, fieldIndex, prop, prop);
else gen
("d%s=types[%i].toObject(m%s,o)", prop, fieldIndex, prop);
} else {
var isUnsigned = false;
switch (field.type) {
case "double":
case "float": gen
("d%s=o.json&&!isFinite(m%s)?String(m%s):m%s", prop, prop, prop, prop);
break;
case "uint64":
isUnsigned = true;
// eslint-disable-next-line no-fallthrough
case "int64":
case "sint64":
case "fixed64":
case "sfixed64": gen
("if(typeof m%s===\"number\")", prop)
("d%s=o.longs===String?String(m%s):m%s", prop, prop, prop)
("else") // Long-like
("d%s=o.longs===String?util.Long.prototype.toString.call(m%s):o.longs===Number?new util.LongBits(m%s.low>>>0,m%s.high>>>0).toNumber(%s):m%s", prop, prop, prop, prop, isUnsigned ? "true": "", prop);
break;
case "bytes": gen
("d%s=o.bytes===String?util.base64.encode(m%s,0,m%s.length):o.bytes===Array?Array.prototype.slice.call(m%s):m%s", prop, prop, prop, prop, prop);
break;
default: gen
("d%s=m%s", prop, prop);
break;
}
}
return gen;
/* eslint-enable no-unexpected-multiline, block-scoped-var, no-redeclare */
}
/**
* Generates a runtime message to plain object converter specific to the specified message type.
* @param {Type} mtype Message type
* @returns {Codegen} Codegen instance
*/
converter.toObject = function toObject(mtype) {
/* eslint-disable no-unexpected-multiline, block-scoped-var, no-redeclare */
var fields = mtype.fieldsArray.slice().sort(util.compareFieldsById);
if (!fields.length)
return util.codegen()("return {}");
var gen = util.codegen(["m", "o"], mtype.name + "$toObject")
("if(!o)")
("o={}")
("var d={}");
var repeatedFields = [],
mapFields = [],
normalFields = [],
i = 0;
for (; i < fields.length; ++i)
if (!fields[i].partOf)
( fields[i].resolve().repeated ? repeatedFields
: fields[i].map ? mapFields
: normalFields).push(fields[i]);
if (repeatedFields.length) { gen
("if(o.arrays||o.defaults){");
for (i = 0; i < repeatedFields.length; ++i) gen
("d%s=[]", util.safeProp(repeatedFields[i].name));
gen
("}");
}
if (mapFields.length) { gen
("if(o.objects||o.defaults){");
for (i = 0; i < mapFields.length; ++i) gen
("d%s={}", util.safeProp(mapFields[i].name));
gen
("}");
}
if (normalFields.length) { gen
("if(o.defaults){");
for (i = 0; i < normalFields.length; ++i) {
var field = normalFields[i],
prop = util.safeProp(field.name);
if (field.resolvedType instanceof Enum) gen
("d%s=o.enums===String?%j:%j", prop, field.resolvedType.valuesById[field.typeDefault], field.typeDefault);
else if (field.long) gen
("if(util.Long){")
("var n=new util.Long(%i,%i,%j)", field.typeDefault.low, field.typeDefault.high, field.typeDefault.unsigned)
("d%s=o.longs===String?n.toString():o.longs===Number?n.toNumber():n", prop)
("}else")
("d%s=o.longs===String?%j:%i", prop, field.typeDefault.toString(), field.typeDefault.toNumber());
else if (field.bytes) {
var arrayDefault = "[" + Array.prototype.slice.call(field.typeDefault).join(",") + "]";
gen
("if(o.bytes===String)d%s=%j", prop, String.fromCharCode.apply(String, field.typeDefault))
("else{")
("d%s=%s", prop, arrayDefault)
("if(o.bytes!==Array)d%s=util.newBuffer(d%s)", prop, prop)
("}");
} else gen
("d%s=%j", prop, field.typeDefault); // also messages (=null)
} gen
("}");
}
var hasKs2 = false;
for (i = 0; i < fields.length; ++i) {
var field = fields[i],
index = mtype._fieldsArray.indexOf(field),
prop = util.safeProp(field.name);
if (field.map) {
if (!hasKs2) { hasKs2 = true; gen
("var ks2");
} gen
("if(m%s&&(ks2=Object.keys(m%s)).length){", prop, prop)
("d%s={}", prop)
("for(var j=0;j<ks2.length;++j){");
genValuePartial_toObject(gen, field, /* sorted */ index, prop + "[ks2[j]]")
("}");
} else if (field.repeated) { gen
("if(m%s&&m%s.length){", prop, prop)
("d%s=[]", prop)
("for(var j=0;j<m%s.length;++j){", prop);
genValuePartial_toObject(gen, field, /* sorted */ index, prop + "[j]")
("}");
} else { gen
("if(m%s!=null&&m.hasOwnProperty(%j)){", prop, field.name); // !== undefined && !== null
genValuePartial_toObject(gen, field, /* sorted */ index, prop);
if (field.partOf) gen
("if(o.oneofs)")
("d%s=%j", util.safeProp(field.partOf.name), field.name);
}
gen
("}");
}
return gen
("return d");
/* eslint-enable no-unexpected-multiline, block-scoped-var, no-redeclare */
};